Car heater and defroster



WEWALD CAR HEATER AND DEFROSTER Mmh 24, 1942.

Feb. s 2 Sheets-Sheet l /A/w: lv T012 MAQ/EN Evt/41.0

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2 Sheets-Sheet 2- w. EWALD Filed Feb. s, 193'/ CAR HEATER AND DEFROSTER March 24, 1942.

/NVE N To@ -WA'Q/PE/v SWA/ D l By 0772 $5/ Patented Mar. 24, V194,2,`

U As'rA'lra s PAT la,

CAR HEATER AND'DEFROSTEB.

Warren d,

Racine, Wis., tor zh 1 r au, l' Young c' mine, Wis.

Application February 3, 1937, Serial No. 123,844 comme. (ci. 257-137) is to provide a conventional blower ian having additional means thereon whereby a desired quantity of heated air may be conducted to and discharged against the windshield in a suitable manner to thereby prevent frosting.

One oi the objects of this invention is to provide a novel core assembly whereby the core may be made up in two sections, each section having two portions of a header attached thereto, whereby aiter the sections are completed as individual brace inlet and outlet tubes IG-I6, the tubes being bonded to the anged openings in the usual way. -Thus it will be seen by referring to 'Figure 3 that hot water, steam or other heating or cooling liquids or gases may pass from one of the tubes IS through the two sides of the core in multiple and out at the other tube.

The plan in the present invention is to draw the recirculated air from the car inclosure inwardly between the fins and thenrearwardly, exhausting the air into the car inclosure as illustrated in Figure 2 by curvilinear arrows.

I provide a rear holding plate 2B being pressed from a dat piece of steel in the form shown in.

Figure 2. The motor 2| is secured to the center oi' this plate by means of bolts 22-22 and cushion washers 23-23. Pockets Zig-2t are formed in member 2t to thereby provide supporting legs which are held against cowl board by means units, they may be made into a unitary core by simply bonding the two portions of the header together. f

Another object of the present invention is t0 provide a unit heater of the class described which is simple, light, neatV and easily manufactured at low cost.

To these and other useful ends my'invention consists of parts and combinations thereof or their equivalents as described and claimed and shown in the accompanying drawings in which:

Fig. 1 is a front elevation of my improved ca heater faken on line I-I of Figure 2. Y

Fig. 2 is a partially sectioned elevation of the device taken on line 2-2 of Figure 1. d

Fig. 3 is a iront elevation of the complete core.

Fig. 4 is a plan view og one of the core units viewed from the header side of the core.

Fig. 5 is a section taken on line E-bof Figure 3.

Fig. 6 is a iront elevation voi the device illustrating the tubes and nozzles used for directing .the heated air against the windshield.

the other set of tubes I position header members I3-I3. Header members I3 are provided with flanges I-I which snugly embrace header members I2, being bonded thereto. On the front side of header members I2 I provide` iianged openings I-I E which are adapted to tightly emof vbolts 23-2. Thus member 2li is securely held to the cowl board and motor 2l is securely held to member it, having means to deaden any sound which might otherwise be transmitted from the motor to the cowl board.

Member 2@ provides a surface as at 30 against which to bind the core as indicated. I provide a vthin plate Si, the inner portion being cone shaped as at 32, thus to prevent the hot air from contacting the motor. A narrow annular opening as at is provided which leaves room enough ii desired for the passage ofgcool air which may enter oriices 3d, the object being to permit a small amount of cool air to pass around the moton'thus to further insure against excessive heating of the motor.

I provide means for recirculating the air through the core and for supplying air to 4the defroster as follows:

Plate 38 is secured to member 30 by means of bolts S7-tl the radiator core being securely held therebetween. This plate is provided with a rearwardly extending flange 3B and a rearwardly extending flange 39 .as indicated in Figure 2. Flange 3S is provided with an inwardly extending ilange t having an opening which is pref-A erably slightly larger than the inside diameter of the core as illustrated in Figure 2. I provide an annular ring di which is secured to flange and having an inwardly extending ange t2 and an opening the same flange.

I provide a housing having a circular opening which is preferably vslightly larger than the opening in flanges t@ and e2 into which I mount diameter as the opening in an air directing means which comprises a circular ring 41 and air; 'directing louvers Il. Ring' 41 is suitably centered on the housing whereby it may easily be turned to the right or left for directing the air as desired. In order to hold the desired adjustment I provide bolts Bil-50 having springs lI-ll, the springs resting on clips lZ-M the inner ends of which rest on ring 41, Spring il provides sumcient pressure on clips l2 to prevent the air directing means from moving except when manually directed.

Housing fitssnugly over flange Il and is secured thereto by means of suitable bolts as indicated in Figure 2.

I provide the usual fan blades 60 having a conventional hub and being secured`to the shaft of motor 2|, whereby when the motor turns air will be drawn into the fan through'the core and discharged under louvers Il inthe desired direc@ tion, the air being heated as it passes through the core.

In the past it has been the custom to provide a separate fan and motor with which to secure sumcient pressure to the air for defrosting purposes. In some devices the air for this fan'is supplied from the discharge side of the heater and in other instances the fan is caused to blow a blast of interior air against the windshield. .The latter device is unsatisfactory because of insufficient heat and the former is unsatisfactory because of the first cost and the inconvenience and cost of operating two motors instead o! one.

Inthe present invention flanges and members as described provide an annular chamber Plates 80 are preferably formed as an integral part of the fan blades 60 each being held con-- frost or sleet on the glass in the coldest weather.

In the present invention I have for convenience illustrated fins Il as a means of extending the heat exchange surface. Other shaped uns may be supplied, for example, the corrugated type which rests between tubes. For convenience I have also disclosed each corev as having 8 tubes.' Tubes and ns obviously may be of various designs and numbers and variously l0 positioned.

Clearly in the design shown the fan and mo-k tor 4may be differently positioned. An entirely different core may be used and a separate cage -fan may .be secured to fan blades 80. Thus it will'be seen that marry changes may be made without departing from the spirit and scope of he invention as recited. in the accompanying claims.

'Having thus described and shown my inven- Qo tion. I claim):

centric with the motor. I provide two annular rings l-BB to which members II are suitably secured thus providing means for mounting a numberof suitably spaced blades 68. 'I'he outside wall of chamber I6 is shaped as illustrated in Figure l, making it suitable for a centrifugal type o! fan housing. Thus it will be seen that members Il and 86bwill act centrifugally to create a vacuum and draw some of the heated airinto chamber $5 and cause it to be discharged from the outlets S'I-Gl. Outlets 81 are provided with suitable, preferably exible tubes 88-88 on the ends of which I secure flattened nozzles 69-89 which are suitably positioned whereby the discharged air will impinge the windshield and thus the heated air will prevent the formation of ice, frost or sleet on the windshield.

The principal object of the present design is to provide sumcient velocity of heated air at the nozzle outlets to prevent the formation of ice,

1. In a heater, a core, a casing for the core, having m'ain and auxiliary air discharge opnings, an air impeller of the axial delivery type adapted to move air through the core, said impeller having a plurality of blades, and an annular series of blades carried by said impeller blades near their peripheries and constituting a blower of radial delivery type, said last men-4 tioned blades .being in number substantially greater than.the number of blades of said axial delivery type impeller. said blower being adapted for forcing air through said auxiliary opening,

and means for rotating said impeller.

2.. A unit heater having an outer casing having a'main delivery opening, a radiator in the casing, a fan of the propeller type for forcing air through said radiator and then through said main opening, and an impeller type of fan including a fan chamber adapted to receive air from the radiator and having oppositely disposed delivery outlets through which the impeller forces air by centrifugal action.

3. A unit heater having an outer casing having a main delivery opening, a radiator in the casing, a fan of the propeller type for forcing air through said radiator and then through said main opening, and an impeller type of fan including a fan chamber adapted to receive air from the radiator and having oppositely disposed delivery outlets through which the impeller forces air by centrifugal action, said impeller being mounted on and at the periphery of said propeller.

WARREN EWALD. 

